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In an ARP request this field is ignored. In an ARP reply this field is used to indicate the address of the host that originated the ARP request. Target protocol address (TPA): 32 bits Internetwork address of the intended receiver. ARP parameter values have been standardized and are maintained by the Internet Assigned Numbers Authority (IANA). [1]
A successful ARP spoofing (poisoning) attack allows an attacker to alter routing on a network, effectively allowing for a man-in-the-middle attack.. In computer networking, ARP spoofing (also ARP cache poisoning or ARP poison routing) is a technique by which an attacker sends Address Resolution Protocol (ARP) messages onto a local area network.
Proxy ARP is a technique by which a proxy server on a given network answers the Address Resolution Protocol (ARP) queries for an IP address that is not on that network. The proxy is aware of the location of the traffic's destination and offers its own MAC address as the (ostensibly final) destination. [ 1 ]
To claim traffic for the proxied host’s IPv4 addresses, it sends gratuitous ARP announcements so that packets addressed to the proxied server go to the proxy instead, and for IPv6 it does the same using the analogous NDP. To maintain the association, it responds on behalf of the sleeping host to ARP and NDP requests.
arping is a software utility for discovering hosts on a computer network by sending link layer frames using Address Resolution Protocol (ARP) requests addressed to a host identified by its MAC address. [1] The utility may use ARP to resolve an IP address provided by the user.
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Reverse ARP differs from the Inverse Address Resolution Protocol (InARP), which is designed to obtain the IP address associated with a local Frame Relay data link connection identifier. [2] InARP is not used in Ethernet .